From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
	id B4FF63861826; Thu,  1 Feb 2024 15:50:17 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org B4FF63861826
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1706802617;
	bh=oI37aen3WP/n8luFMw604emJC1P3k6yiIwD4qoG45xM=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=SbluWSq6g4g+4thC93GEUNUJ/zMS3TOvjFNxcAZG9/lRXDxBO2rLDNaROJLcd1SMA
	 0FRB3blzTQ3/govwPFhVLCPYmDNbwP42eGSwV39FpgCkAW0RAwwfhQf5iO5ru22d2G
	 NdewXDKDAzzD0Gac0Ae/hxRnIrPyz4m2zpv4bE+I=
From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/112437] ICE with throw inside concept sometimes and
 -std=c++20
Date: Thu, 01 Feb 2024 15:50:17 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: ice-on-valid-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: cvs-commit at gcc dot gnu.org
X-Bugzilla-Status: ASSIGNED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: mpolacek at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-112437-4-Gli4yA9kHU@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-112437-4@http.gcc.gnu.org/bugzilla/>
References: <bug-112437-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
List-Id: <gcc-bugs.sourceware.org>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D112437

--- Comment #5 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-12 branch has been updated by Marek Polacek
<mpolacek@gcc.gnu.org>:

https://gcc.gnu.org/g:4617c9b6eb22062a319dcdbddb8c3cebce398c15

commit r12-10124-g4617c9b6eb22062a319dcdbddb8c3cebce398c15
Author: Marek Polacek <polacek@redhat.com>
Date:   Wed Jan 31 17:33:26 2024 -0500

    c++: ICE with throw inside concept [PR112437]

    We crash in the loop at the end of treat_lvalue_as_rvalue_p for code
    like

      template <class T>
      concept Throwable =3D requires(T x) { throw x; };

    because the code assumes that we eventually reach sk_function_parms or
    sk_try and bail, but in a concept we're in a sk_namespace.

    We're already checking sk_try so we don't crash in a function-try-block,
    but I've added a test anyway.

            PR c++/112437

    gcc/cp/ChangeLog:

            * typeck.cc (treat_lvalue_as_rvalue_p): Bail out on sk_namespac=
e in
            the move on throw of parms loop.

    gcc/testsuite/ChangeLog:

            * g++.dg/cpp2a/concepts-throw1.C: New test.
            * g++.dg/eh/throw4.C: New test.

    (cherry picked from commit 65b105b4f399559685200e1598ead8c7d0935c04)=